die for cutting and shaping can-heads



(No Model.) 2 Sheets-Sheet 2.

B. W. MORFOOT. DIE FOR CUTTING-AND SHAPING CAN HEADS. No. 518,724.Patented Apr. 24, 1894.

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UNITED STATES PATENT OFFICE.

BENJAMIN W. MORFOOT, OF CHICAGO, ILLINOIS.

DIE FOR CUTTING AND SHAPING CAN-HEADS.

SPECIFICATION forming part of Letters Patent No. 518,724, dated April24, 1894- Application filed August 4, 1893- To all whom it may concern.-

Be it known that I, BENJAMIN W. MORFOOT, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Dies for Cutting and Shaping Can-Heads havingDetachableStrips; and I do hereby declare that the following is a full, clear, andexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon, which form apart of this specification. r r

The invention has for its object to provide a practical construction indies for preparing, at a single stroke from a flat-sheet of metal,flanged can heads having an annular detachable strip in its flat face,which strip has an outward extension terminating in a free plongiuewhich'extends beyond the flange of the In the accompanying drawingswhich illustrate my invention, Figure 1 is a plan of the blank as out bythe dies during the first part of their inoperative movement. Fig. 2 isa perspective of the completed can head as finished by the dies in theircomplete operative movement. Fig. Sis a face View of the lower or matrixdie. Fig. 4 is a section in the line 4-4 of Fig. 3. Fig. 5 is a faceview of the upper or punch die. Fig. 6 is a section in the line 6-6 ofFig. 5. Fig.7 is an enlarged detail showing the separate block insertedin the matrix die. .Fig. 8 is a detached view of said separate block ofthe matrix die. Fig.

9 is a face View of the separate tongue punch of the cutting and formingor upper punch die, and Fig. 10 is a side View of the added tonguepunch, detached.

A represents the blank as cut from a flat sheet of tin or otherv metalduring the first part of the movement ofthe dies and before theformation of the flange or of the Weakened lines therein, and B thecompleted flanged cover provided with the weakened lines I) b as itemerges from the dies after their full operative movement.

B designates the flange and B represents the protruding tongue formed onthe blank. The two parallel concentric weakened lines b b form theborders of the body of the detachable strip B of the completed can head,and each of said weakened lines 6 b has an outwardly directedprolongation, (b I), respectively,) preferably tangential to ts generalcourse and also preferably termlnatlng in a slit b which is continuouswith the adj acent side edge of the tongue B and which slit extendseither partially or wholly across the flange B of the completed canhead. hen

the outer of said weakened lines, I), is at the angle of the flange withthe body of the head, the deflected or tangential prolongation thereofwill of course be obliterated if the slit extends to said line, but thisconstruction is intended to be included in my appended claims. It willbe observed that the inner of the two weakened lines, I), is continuousbut that the outer line b extends only to the opposite sides of thedeflection or branch of the detachable strip.

When the coverB is applied to the can body it is placed externally uponthe latter and the tongue B or its end portion at least, is free to beseized bya suitable instrument for tearing out the detachable strip. Theslits 1) extending into or across the flange of the cover facilitate thestarting of the detachable strip and also favor the admission of solderbeneath the tongue in soldering the head to the body. Now describing thedies by which this can head is formed, C represents the lower or matrixdie and D the upper or punch the. The die C comprises the outer annularportion 0' the inner edge of which assists in cutting the outer circularedge of the blank A before said blank is bent. This annular portion C ofthe die C contains the recess C the edges of which assist in cutting thetongue 13 of said blank. \Vithin the annular portion C and removedtherefrom by a space 0 equal to the proposed depth of the flange B ofthe can head is a concentric, central portion C the outer edge of whichis a continuous circle, this center C being somewhat below the plane ofthe outer portion C. The edge 0' of the central hole C is concerned incutting the filling hole a in the cover. The

upper or punch member of the die comprises the raised cutting andforming rim D together with the lateral, andin this case tangential,branch or punch D the former fitting as a punch within the ring C andthe latter as a punch within the recess C of the opposite die D so as tocutthe blank A from a sheet. The inner edge of the rim D fits as aformer over the raised part C of the die C so as to form the flange B ofthe can head by bending down the edge of the blank A into the recess 0.The die D is further shown as having the central punch D which fits thehole O of the die 0. The bringing together of the members of the die, asso far described, therefore first cuts thejblank A of Fig. 1 and secondcuts the filling hole and turns down the flange and the tongue of theblank to form the cam head of Fig. 2. The depressed surface of therecess D of the punch die D and the raised surface C of the matrix die 0have opposing grooves and ribs for producing the weakened lines alreadydescribed as present in the can head. Preferably, as I have found, theribs are on the raised surface of the member 0 and the grooves on theopposing depressed surface of the die D, and they are so herein shown, 00 being the circular portions of said ribs and c c the deflected ortangential extensions ofsaid ribs. Oorrespondingly d d are the opposinggrooves in the upper die member D and d d the deflected or tangentialextensions of said grooves. As a preferable construction the matrix die0 is composed of three parts, to wit, the outer annular portion 0, theinner portion 0 and the separate part 0 bearing the straight ordeflected portions 0 and c of the ribs which are concerned in formingthe weakened lines, said third part C being inserted in a marginal notchor recess cut in the main central portion of the die, as shown in Fig. 3and in the detail Fig. 7. This block 0 is shown detached in Fig. 8 andit is desirably held firmly in place by a screw 0 inserted laterallythrough it into the other part of the central portion of the die. Thepunch die D, if including the center punch D is preferably formed inthree parts, to wit, the main circular portion D D the tongue punch Dand the center punch D The tongue punch D is shown detached in Figs. 9and 10, in which,Fig. 9 is atop View, and Fig. 10 a side view. Thistongue punch D is desirably more elevated than the surface of the bodyof the die to which it belongs and therefore is shown as having anoverhanging lip 01 which, when in place, rests upon the marginal cuttingand forming rim D, and will usually terminate flush with the inner edgeof said rim. The holding block D for the die D is recessed, as shown inthe sectional Fig. 6, to receive the die, said holding block beingprovided with the lugs D and D between which the tonguepunch D issecured by one or more set screws d If the die is constructed, as shown,to form the filling hole a in the can head, the die members are alsoadapted, as indicated, to form the usual groove to receive the edge ofthe cap which is to be applied after the can has received its contents.

By the construction of the members of the die in parts, as abovedescribed, its cost is materially lessened. For example, the main may befirst central portion of the die carrying the ribs given a completecircular form by turning in a lathe and the ribs may also be turnedcontinuously thereon and then a portion of the die may be cut out toreceive the block 0 which carries the tangential or otherwise deflectedportions of said ribs which may also be more simply and inexpensivelyformed on a separate piece by planing or otherwise. In the oppositemember the grooves may be made continuous by turning and the deflectedor tangential portions subsequently planed or cut therein.

The periphery may also be turned to a circle, the tongue punch beingseparately made and secured in its proper place in the manner described.In the case of a square can which invariably has rounded corners, eachcorner portion of the die may be a separate inset segmental piece in orupon which the grooves or ribs may be formed by turning, the straightportions of said ribs or grooves being formed on the body of the die byplaning.

The construction of the can head having the weakened lines and dependingtongue, as

herein shown and described, forms the subject of a separate applicationfor patent, Serial No. 475,902, filed May 29, 1893. The only departurehere made from the construction therein described consists in theprovision of the slits b in continuation of the side edges of the tonguepartially or wholly across the flange B. These slits are formed by thedie above described although there are no cutting edges opposed to theoverlapping lip 61 of the punch D I claim herein the can head havingthis added feature as a characteristic of the product of the diedescribed when provided with the elevated tongue punch having the inwardextension. By making the tongue punch D with its face in the same planewith that of the cutting and forming rim D these slits b will not beproduced, and I, therefore, make a special claim intended to cover theconstruction of the die in which the tongue punch is elevated, asdistinguished from other claims under which it may or may not be thusraised.

I claim as my invention- 1. The can head, cutting and bending diesdescribed, having the recess and punch for forming the tongue and, uponthe surface of one of the members, the ribs adapted to form weakenedlines in the top of the cover and branches thereof directed to the edgesof the tongue-formin g devices.

2. The can head, cutting and bending dies described, having the recessand punch for forming the tongue and, upon one member, ribs and in theopposing member grooves, adapted to form parallel weakened lines in thetop of the cover and branches thereof directed to the edges of thetongue-forming devices.

3. The die member 0 having the rim 0' provided with the outwardlydirected recess 0 in combination with the opposing membcrD ICC havingthe rim D and the punch D the latter fitted to co-act with the'recess Cto form the tongue on the can cover.

4. The die member 0 having the rim 0 provided with the recess 0 incombination with the opposing member D having the rim D and the punch Dthe latter projecting beyond the face of the rim D and being fitted 'tothe recess 0 substantially as and for the purposes set forth.

5. The die memberO having the rim 0 provided with the recess 0 andhaving also the less raised center separated from the rim 0' by theannular space a, in combination with the opposing memberD provided withthe rim D adapted to enter the space 0 and provided with the branch Dadapted to enter the re cess C the opposing members being provided onewith ribs and the other with grooves having branches directed to theedges of the said branch punch D and recess 0 substantially as and forthe purposes set forth.

6. The die member having the branched ribs for forming weakened lines ina metal sheet, the branches of said ribs being formed on a pieceseparate from the body of the die and suitably fastened in place, incombination with an opposing die member, the whole being adapted forcutting and forminga can head having weakened lines tachable strip.

7. The die member D having the rim D and the tongue punch D formed of aseparate piece secured in place, in combination with an opposing diemember, the whole being for producing a decutting and forming a can headhaving a de-v

